<?php

/**
 * 获取字符串首字母 首拼
 */

namespace utils;


class FirstSpell
{
    static function get($str){
        $model = new self();
        return $model->firstPinyin($str);
    }

    function firstPinyin($zh) {
        $ret = "";
        $s1 = iconv('UTF-8', 'GB2312//ignore', $zh);
        $s2 = iconv("GB2312", "UTF-8", $s1);
        if ($s2 == $zh) {
            $zh = $s1;
        }
        for ($i = 0; $i < strlen($zh); $i++) {
            $s1 = substr($zh, $i, 1);
            $p = ord($s1);
            if ($p > 160) {
                $s2 = substr($zh, $i++, 2);
                $ret .= $this->getfirstchar($s2);
            } else {
                $ret .= strtoupper($s1);
            }
        }
        return strtoupper($ret);
        $ret = '';
    }

    /**
     * 返回首字母 大写
     * @param $s0
     * @return string|null
     */
    function getfirstchar($s0) {
        $fchar = ord($s0 {
        0 });
        if ($fchar >= ord("A") and $fchar <= ord("z"))
            return strtoupper($s0 {
            0 });
        $s1 = iconv('UTF-8','GB2312//ignore',$s0);
        $s2 = iconv("GB2312", "UTF-8", $s1);
        if ($s2 == $s0) {
            $s = $s1;
        } else {
            $s = $s0;
        }
        $asc = ord($s {
            0 }) * 256 + ord($s {
            1 }) - 65536;
        if ($asc >= -20319 and $asc <= -20284)
            return "A";
        if ($asc >= -20283 and $asc <= -19776)
            return "B";
        if ($asc >= -19775 and $asc <= -19219)
            return "C";
        if ($asc >= -19218 and $asc <= -18711)
            return "D";
        if ($asc >= -18710 and $asc <= -18527)
            return "E";
        if ($asc >= -18526 and $asc <= -18240)
            return "F";
        if ($asc >= -18239 and $asc <= -17923)
            return "G";
        if ($asc >= -17922 and $asc <= -17418)
            return "H";
        if ($asc >= -17417 and $asc <= -16475)
            return "J";
        if ($asc >= -16474 and $asc <= -16213)
            return "K";
        if ($asc >= -16212 and $asc <= -15641)
            return "L";
        if ($asc >= -15640 and $asc <= -15166)
            return "M";
        if ($asc >= -15165 and $asc <= -14923)
            return "N";
        if ($asc >= -14922 and $asc <= -14915)
            return "O";
        if ($asc >= -14914 and $asc <= -14631)
            return "P";
        if ($asc >= -14630 and $asc <= -14150)
            return "Q";
        if ($asc >= -14149 and $asc <= -14091)
            return "R";
        if ($asc >= -14090 and $asc <= -13319)
            return "S";
        if ($asc >= -13318 and $asc <= -12839)
            return "T";
        if ($asc >= -12838 and $asc <= -12557)
            return "W";
        if ($asc >= -12556 and $asc <= -11848)
            return "X";
        if ($asc >= -11847 and $asc <= -11056)
            return "Y";
        if ($asc >= -11055 and $asc <= -10247)
            return "Z";
        return null;
    }
}